Cleaning attachment for thrashing machines



1. R. AND E. c. n/wn/HLLAN. CLEANING ATTACHMENT FOR THBASHING MACHINES- API-LICATION FILED JULY 17, |920.

.Patented m5194922,

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WITNBSI J. n. AND E. c. MCMIL'LAN.

CLEANING ATTACHMENT FR THRASHING'MACHINES.

Patented May 9, 1922.

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APPLICATION FILED IULY'I71I920.

UNITED STATES JOHN n. u;eivr-mnaivy AND Brenner-r c. or .BusHolm,m.\.nsieis`.

specification Ormea aan. Patented' May 9,1922.

App-nemen inea my 17, i526. serial' N.- 396,976;

To all wkcmffmayconce'm:

B'e it lrncwn that; we,-JoH-N R, MCMLLAN and EiN'nsT C.' -McihIrLLAN-,citizens of the United States, residing at'y Bu'sfhong, in the county of Lyon and State of Kansas, have To the attainment of the foregoing,the

invention consists in the improvementy as l hereinafter described and denitely claimed.

In lthe accompanying drawings, hereby made a part hereo-f: I

Figure 1 is a longitudinal verticaly Section showing a cleaning attachment-constructed in accordance with our invention a'sproperly arranged relatively to a thrashing machine.` a v e Figure 2 is a side elevation illustrative ofthe improvement. Similar numerals of reference designate corresponding parts in all of the views of the drawings.

The grain pan 1 of the thrashing machine is provided in accordance with our invention, with a plurality of rearwardly directed spaced serrations 2.

At 3 is a rotary'cleaning fan, and at 4 is the casing'thereof from which extends an kupwardly and rearwardly directed conduit 5.

In accordance with our invention, and in front of the fan 3, is an auxiliary rotary fan 6 that isv disposed in a casing 7 having an upwardly and rearwardly directed conduit 8, the discharge end of which is disposed below and substantially in vertical alignment with the rear end of the grain pan l.

Disposed below and in spacedl relation to the pan 1 with the serrations 2, and extending rearwardly va considerable distanceV beyond said pan 1 is a chaifer 9 having at its rear end an extension 10 connected to the chaifer or chaffer-body 9 in the manner hereinafter specifically described. The chaffer 9 and its extension 10 are-provided with dischargespouts 10".

Extending below the chaifer body 9 and the extension 10 isa casing .12 in whichis disposed a tailings auger 13 and a grain auger 141.' In thesaid casing 12 isaln` up-perlshoe sie-ve" 1&5, anda lower shoe sieve-16,and

afdapted'to' serve'- as a chute for the conveywill: here be noted that the bottom 17 ofy fthe leasing` 12 is inclined' and thereforek ancelof the grain' to' the auger 14.y 'A

Y virtue ofi the construction and relative :arrangement of the elements described, it willl` belreadiily'lunderstood that the thrashed grain and chan' are delivered by the grain pan 1 to the chafl'er 9,'and that incidental to Y said delivery the grain and chan'ifall through or are subject to the action of av 'rearward and upward wind-blast emanating The cha'er is also 'f subjectto the wind-blast from vthe conduit 5, and it will be noted in this connection .l that a kcomparatively short supplemental a pan 20 lis extended forwardly, from the dis-` charge end of the conduit 5, and is arranged v below and in spaced relationto the chatfer from they conduit 8'.

9 and has itsrea'r end arranged to deliver grain tov the upper shoe sieve' 15. As the y grain and chaff pass rearwardly from-the grain panl, the strong blast of air will cause the chaff and other like material toy rise, while they grain will gravitate throu h the front portion of the chaffer and will be received on the supplemental pan 20. It

k815` willalso be noted that the forward end of the .chalfer or ychatter body9 extends a considerable distance in vfront of the forward ends of the shoe sieves, with the result that considerable grain is enabled to gravitate to the front portions'of the cleaning sieves,

and liability of grain being blown over the i i rear end of the cleaning attachment and linto the straw or tailings lis reduced to a' minimum. W'e vwould also have it understood that the lowerand rear fan 3 is an under-blast fan, and the uppermost -and" foremost vfan 6 may be made either over,-

blast or underblast as conditions render:` f

most expedient. Y

In Figure 2 we show the necessary driving connections for the working parts of our improvement, but inasmuch as said driving connections are not of the essence of'our invention, we do not deem 1t neces'- sary to enter into a detailed description` of the same. y

In 4the vconnection of the extension 111 to thechafl'er 9, the said extension is fixed to.v

a transverse rockshaft 11, journaled'inbe'arings at the rear end of the chan'er9. To

the said rock shaft 11 is xed a hand lever 307 disposed at the outer side of the thrasher casing, Figure 2, and equipped with a detent 3l for cooperation with a fixed seg-Ik spaced relation to the rear portion of said` pan and extending rearwardly of thefsame, a rearwardly extending chaft'er section connected to the rear end of the chaffer body, a

easingy below the chaffer body and chafer eX- tensionl conveyors 1n said casing, a shoe'sieve tures.r

arranged in said casing and below the rhaer body and chatter section7 a short grain pan section Yarranged"under a'ndin spaced relationrto the chatter body, spouts carried by the chatter body and extension, the forward of said spouts being arranged to discharge grain to said short grain pan section, means for delivering a rearwardly directed blast of air between the rear end of the grain pan and the forward ends of the chalier body and the short grain pan section, and means for delivering a rearwardly directed blast of air into the casingl and above and below the shoe sieve therein.

n testimony whereof we afix our signa JOHN' la.v i/ICMILLAN. ERNEST o. MCMILLAN. 

